Alshehry, A. S., A. H. AL-Jarrah, R. . Abu-Dawwas, and A. AL-Kateeb. “On Rings With Involution and Inner Rings”. Results in Nonlinear Analysis, vol. 7, no. 2, June 2024, pp. 79–88, https://nonlinear-analysis.com/index.php/pub/article/view/355.